Winter weather chills commuters

A commuter makes his way through downtown as temperatures hovered in the single digits during the morning rush hour December 13, in Chicago, Illinois. With wind gusts up to 40 miles per hour the wind chill temperatures in the city have been around -10 degrees.

Marcus Marter / South Bend Tribune via AP

A man walks across the Colfax Avenue bridge during a snow storm on Monday, Dec. 13, in South Bend, Ind.

David Goldman / AP

A pedestrian shields himself from a gust of snow flurries Monday, Dec. 13, 2010, in downtown Atlanta.